#import "Reachability.h"

- (id) init {
    ...
    self.internetReachable = [Reachability reachabilityForInternetConnection];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(checkNetworkStatus) name:kReachabilityChangedNotification object:nil];
    [self.internetReachable startNotifier];
    ...
  }
- (void)  dealloc
 {
    [self.internetReachable stopNotifier];
    [[NSNotificationCenter defaultCenter] removeObserver:self];
 }

NSCAssert([(NSObject*) info isKindOfClass: [Reachability class]], @"info was wrong class in ReachabilityCallback");

- (void)dealloc
{ // self.hostReachability is my property holding my Reachability instance
    if (self.hostReachability) {
        [self.hostReachability stopNotifier];
    }
}